staging: rtl8192u: Remove unnecessary blank lines

This patch fixes the file r8192U_core.c to avoid the chechpatch.pl
warnings:

	CHECK: Please don't use multiple blank lines
	CHECK: Blank lines aren't necessary before a close brace '}'
Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/95ce1564a34ff65e51fd63a241713e23e12dac91.1568814125.git.sylphrenadin@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>